Time-lock.



No. 665,374. Patented Ian. I, l90l.

' H. C. STDCKWELL.

TIME Lock. (Application led -Tuly 13, 189B.)

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TIME LOCK.

(Application Bled July 13, 1898.)

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llllillu Niort: STATES HERBERT C. STOCKWELL, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO THE YALE & TOWNE MANUFACTURlNG COMPANY, OF STAMFORD,

CONNECTICUT.

TIME-LOCK.

SPECIFICATION forming part of Letters Patent No. 665,374, dated January 1, 1901.

Application filed July 13, 1898. Serial No. 6851890. (No model.)

To all whom t may concern.-

Be it known that I, HERBERT C. STOCK- WELL, a citizen of the United States, formerly.

Time-Locks, of which the following is a specication.

The improvement relates to time -locks which are arranged to lock automatically upon the shutting of the door and to open again after the lapse of a given time for which the mechanism has been set. There are occasions, however, when itis desired to close a door to which such a lock is applied and to fasten it with a combination or other lock without having the time-lock go on guardas, for instance, during some temporary period during the day.

My invention consists in a retaining device which can be called into use to hold the unlocking-lever or dogging-lever of the timelock in the unlocked position, notwithstanding the shutting of the door, for such time as may be required, but which may readily be withdrawn when it is desired to have the timelock eective, so that the operation of the time-lock will then go on as before.

When my device has been applied to a lock, it is very desirable that when the time comes for locking up at night there should be no mistake made in disconnecting it, so that the lock will be locked under control of the timemovements.

To prevent my device being left on through carelessness, I provide an indicator Which is plainly presented to View when the retaining device is in engagement with its controlled parts, so as to announce that fact and prevent its being overlooked. This is conveniently arranged by making an opening in the door of the time-lock, through which can beplainly seen a disk carried bythe retaining device, which will when seen indicate that the locking mechanism is o. This disk may have upon it the Word open or any other legend or device to attract the attention of the user of the lock.

As an additional safeguard against carelessness I so adjust my retaining device that when the time-lock runs down it will automaticallydisconnect my retaining device, so that thereafter the time-lock when wound up will operate normally until my device is again set by hand to hold the unlocking-lever or dogging-lever in unlocked position.

My invention will be understood upon ref- `erenee to' the accompanying drawings, in

which- Figures 1, 2, 3, and 4 are respectively a front view, a rear view, a horizontal section, and a vertical section of a time-lock case of common construction having one form of my improved attachment applied thereto. Figs. 5, 6, 7, and 8 are similar views showing a slight modification of the attachment employed for the same purpose.

Referring to Figs. 1 to 4, inclusive, l represents the case of a time-lock provided with compartments 2 for the reception of the usual time-movements 3 and with an inclosing door 4. Within the case is mounted the usual bar 5, supported by parallel links 6 and having upon its rear side the lugs 7, with which the pins S on the dials of the time-locks come into engagement for the purpose of imparting a longitudinal thrust to the bar 5 when any one of the movements runs down to the point where the pin on any one of the dials comes into engagement with its corresponding lug 7 in order to give the impulse tothe dogging or unlocking lever which permits retraction of the boltwork. All of these parts are of common and well-known construction and need not be described at length. The dogging or unlocking lever of common construction is shown at 9 in the rear View, Fig. 2, the same being mounted upon pivot l0 and carries a counterpoise 11 at one end, While its opposite end 12 engages a gate 13, which opens and closes the aperture 14 as the .boltwork is to be unlocked or prevented from unlocking. The lever 9, with its controllinggate 13, is moved through the medium of rock-shaft 15, carrying on its rear end the segment 16, which engages with a similar segment 17 on lever 9. Rock-shaft 15 receives movement through the medium of crank-arm 18, which is impinged by the thrust-bar 5, when the time-movements become effective. So much of the construction is not new.

The subject of my present invention con- IOO sists of a detent 20, adapted to engage in a notch 2l, close to the fulcrum of the lever 9, and to thereby hold said lever 9 in its elevated or unlocked position until said detent is released, The detent is mounted upon a shaft 22, projecting substantially parallel with the rock-shaft l5, and is moved into engagement with the lever 9 by means of an arm 23 upon its front end. Access is gained to this arm by opening the door to the time-lock. The shaft 22 is provided with a torsion-spring 24, which holds the detent 2() normally ont of engagement with the lever 9; but the notch 2l in lever 9 is such that when the detent is in engagement therewith the detent, as well as the lever, is engaged, and the lever is prevented from moving under the influence of its spring 9 until movement is first imparted to the lever 9 to disengage said detent. This further movement of lever 9 in the direction of unlocking, which may be readilyimparted to it in the construction of the parts, is not only the normally-employed means for releasing the detent, but it likewise serves to release said detent when the impulse is imparted to the thrust-bar 5 by the time-movements. It therefore follows that should the detent through inadvertence not be released before shutting the door it will be released the first time that the time-movements are run down and impart unlocking movement to the lever 9.

As a safeguard against leaving the detent in effective position when the door is closed for the night or for any protracted period the arm 23 on the frontend of the shaft 22 carries an indicator 25, which when the detent is in engagement will appear before a peephole 26 in the door 4 of the case and by the word open or any other legend or device thereon will announce the fact that the detent is in effective position, so that the operator will not fail to release it and leave the (logging or unlocking lever in effective position to bring the boltwork under control of the time-lock.

In the modified arrangement shown in Figs. 5 to S the engagement between the detent of the shaft 22Art and the rock-shaft 15 is established by means located upon the front ends of said shafts. These means consist of a detent 20, mounted upon the shaft 22, and an engaging arm l5, carried by the shaft l5. A connection between the shafts 22:L and l5 on the rear side of the case, as well as the construction of all the other parts, is identical with corresponding parts described with reference to Figs. l to et. In Figs. 5 to 8, however, the controlling-arm 23 and indicator 25 assume a slightly-different position, the peephole 26 being correspondingly changed in the door 4. In order to sustain the engagement of the detent 20 with the arm 15 until the former is released by a slight movement of the latter in the direction of unlocking, said detent 20 is provided with a shoulder 20, which rests upon the end of arm l5a and holds the detent 20n,with its indicator, in opposition to its spring. By this arrangement of the parts it becomes necessary to extend the shaft 22TL to the back of the case, and I am therefore enabled to employ for said shaft a screw tapped inte a fixed part of the mounting and to employ a spring 24" for holding the detent normally out of engagement after it is released.

Fromthe foregoing description it will be seen that I have provided means which may be repeatedly called into service at will for holding the lever in unlocked position and is readily detached when it is desired to put the time-lock on guard, and which means is provided with an indicator which will announce the fact whenever it is in use, while the detent will be automatically disengaged, should it be overlooked, the first time that the time-v lock is run down.

The normal operation of a time-lock of the class shown in the drawings is that the movements shall stop every time the lock opens. When the movements are wound again and the safe-bolts thrown forward, the dog of the lock will automatically lock until the timemovements again run down and unlock the lock. The object of my device is such that even when the movements are wound the lock-dog may be held in the unlocked position, even when the safe-bolts are thrown forward.

The detent 20 is operated by hand in the direction of engagement with the dog and is thrown out of engagement by the coil-spring. When this detent is engaged with the locking-dog and it is desired to release it so that the lock will lock, the way that thisV is accomplished is by pushing the heel of the detent 18 to the right, and the detent for the operation of the spring will then disengage. This pushing, which is ordinarily done by hand, will, if through inadvertence the locking attachment is left in engagement, be done when the time-movements next run down through the unlocking-bar, which will itself push on the heel of this detent and allow the spring to throw off the supplemental unlocking attachment.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

l. A time-lock comprising the (logging or unlocking lever, arranged to be moved to the unlocked position through the operation of the time-movements; of a detent constructed to engage with said dogging-lever to holdit in unlocked position, and a connecting-lever one end of which connects with said detent, and the other end with the unlocking-bar with which the movements engage, so that when the unlocking-bar is moved through the operation of. the time-movements, said detent is automatically disconnected and the dogging-lever left in position to lock automatically.

2. In a time-lock, the combination of the dogging or unlocking lever, which normally clo IOO

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assumes looked position, a detent movable into engagement therewith to hold it in unlooked position, and an indicator which shows when the detent is in such engagement; substantially as set forth.

3. In a time-look the combination, With the dogging or unlocking' lever, arranged to be moved to unlocked position by the time-lock; of a detent constructed to engage therewith to hold it in the unlocked position; the said detent being moved out of engagement by the time-lock so that Whenever the time-lock is unlocked the detent is automatically disconnected; substantially as described.

4. In a time-lock, the combination of the the parts set to normal positions, substantially 2 5 as explained.

HERBERT C. STOCKWELL. Witnesses:

SGHUYLER MERRITT, GEO. E. WHITE. 

